#include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; int a[101] = {}; int b = 0; int c = 10000; for(int i = 0;i < n;i++){ cin>>a[i]; if(a[i]<c){ c = a[i]; }else if(a[i]>b){ b = a[i]; } } cout<<b-c<<endl; }